package com.situ.day1;

import org.junit.Test;

public class HelloWorld {

    //main
    public static void main(String[] args) {
        //sout
        System.out.println("HelloWord");
        //Ctrl+D复制当前行到下一行
        System.out.println("HelloWord");

        //类型  变量variable
        // 关键字：int final public void static
        // java已经有特殊用途
        int age = 23;
        age = 134;
        // age = 3.14;
        //常量
        final int count = 23;
        //Cannot assign a value to final variable 'count'
        //count = 34;

        int $nAum_3 = 34;
    }

    @Test
    public void test1() {
        //soutm
        System.out.println("HelloWorld.test1");
        byte b1 = 12;
        //byte b2 = 128;
        byte b3 = 127;
        int i = 1287777777;

        double d = 3.14;

        char ch1 = 'a';
        char ch2 = 'b';
        char ch3 = '!';
        char ch4 = '=';

        boolean boo1 = true;
        boolean b002 = false;
    }
}
